基于简化三电平SVPWM算法的逆变器研究

Study and Realization of Simplified SVPWM Algorithm based on Three Level Inverter

分析了三电平SVPWM的简化算法,将传统两电平逆变器的电压空间矢量控制算法用于三电平逆变器,对该算法进行了详细的数学推导,同时给出其实施步骤,并利用DSP实现了该算法。在实验室将一个22 kW的三相异步电机作为实验对象,在工业现场采用55 kW和1 000 kW三相异步电机作为研究对象,三者的实验结果证明,该算法实现简单,能够在实践中取得良好的性能。

A novel simplified space-vector pulse width modulation （SVPWM） algorithm of a three-level inverter was analyzed.The traditional space-vector module algorithm of a two-level inverter was applied to a three-level inverter based on DSP.Mathematical calculations of this algorithm were performed and its implement steps were showed.Taking a 22 kW three-phase asynchronous motor in lab and a 55 kW and a 1 000 kW three-phase asynchronous motor in field as experimental subjects, the experimental results of three motors testify the effectiveness of the simplified SVPWM modulating algorithm and it can get good performance in practice.